dang, I was hoping if it was just a partial tear, he might be able to return this season but it seems a partial tear takes as long as full tear or rupture.
"Of the 31 players who sustained an Achilles tendon rupture, 21 (64%) returned to play in the NFL at an average of 11 months after injury. In the three seasons following their return, those 21 players saw significant decreases in games played and power ratings compared to the three seasons preceding the injury."
Return to football after Achilles tendon rupture | Lower Extremity Review Magazine